CO gas emission reduction system in dry quenching furnace pre-storage chamber
By sending the flue gas released from the dry quenching coke pre-storage chamber into the coke oven gas pipeline for combustion to generate and process CO2, the problem of high CO gas concentration is solved, realizing the resource utilization of CO and improving the heating effect of the coke oven, reducing energy consumption and pollution, and the system is safe, stable and adaptable to various working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXING DUCTILE IRON PIPES CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, the CO gas concentration in the pre-storage chamber of the dry quenching furnace is high, and direct emissions cause serious pollution. Traditional treatment methods are energy-intensive and unstable in operation, and cannot achieve the resource utilization of CO.
The flue gas released from the dry quenching coke pre-storage chamber is sent to the coke oven heating gas pipeline after passing through a bag filter. It is mixed with the coke oven gas and then burned to generate CO2. The CO2 is then treated by the coke oven flue gas desulfurization and denitrification system and finally discharged from the coke oven chimney. Monitoring and safety shut-off devices are installed to ensure the stable operation of the system.
It realizes the resource utilization of CO, reduces energy consumption and operating costs, improves the heating effect of coke ovens, reduces pollution, and the system is safe and stable, adaptable to various working conditions, has good compatibility, and is easy to promote.
Smart Images
Figure CN224578232U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coking plant dry quenching exhaust gas treatment technology, and in particular to a CO gas emission reduction system for the pre-storage chamber flue gas of a dry quenching furnace. Background Technology
[0002] Dry quenching technology is an important energy-saving and environmentally friendly technology in the coking industry. It recovers heat energy and generates steam by cooling red-hot coke with inert gas. The pre-storage chamber is an important component of the dry quenching furnace, used to buffer and homogenize coke. However, its flue gas contains a large amount of CO gas, accounting for about 6% of the total gas content, with a concentration as high as 60,000 Nmg / m³. 3 .
[0003] In existing technologies, the flue gas released from the pre-storage chamber of a dry quenching furnace is usually emitted directly or after simple dust removal. Some companies have attempted to treat the gas using combustion methods, but these suffer from high energy consumption and unstable operation. There are also reports of using catalytic oxidation methods, but the catalyst is prone to deactivation, resulting in high operating costs.
[0004] The existing technology has the following drawbacks: 1) Direct emissions, with CO concentrations as high as 60,000 Nmg / m3, cause serious pollution and increase the burden of pollution discharge taxes; 2) Traditional treatment methods are energy-intensive and unstable in operation; 3) It is impossible to realize the resource utilization of CO.
[0005] Therefore, it is necessary to provide a CO emission reduction system for the flue gas released from the pre-storage chamber of a dry quenching furnace to solve the problems of high CO concentration and high treatment cost in the flue gas released from the pre-storage chamber of dry quenching coke. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a CO gas emission reduction system in the flue gas released from the pre-storage chamber of a dry quenching furnace, which realizes the resource utilization of CO and improves the heating effect of the coke oven.
[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A CO emission reduction system for the pre-storage flue gas of a dry quenching furnace includes a main outlet for the dry quenching flue gas, a dust collector, a dust removal fan, a main exhaust gas pipeline, and a main coke oven gas pipeline connected in sequence. The dry quenching flue gas enters the main coke oven gas pipeline after the regulating valve of the basement gas pipeline, and a mixer is configured to fully mix the dry quenching flue gas with the coke oven gas. The main exhaust gas pipeline is equipped with, in sequence, a first electric regulating valve, a first quick-cut-off valve, a rupture disc, a reliable isolation device, a combustible gas analyzer for monitoring the oxygen and dust concentrations in the dry quenching flue gas, a first pressure transmitter for monitoring the pressure of the dry quenching flue gas, and a first temperature measuring element for monitoring the temperature of the dry quenching flue gas.
[0008] A further improvement of this utility model's technical solution is that: the main coke oven gas pipeline includes a No. 1 coke oven gas pipeline and a No. 2 coke oven gas pipeline arranged in parallel; on the first waste gas conveying branch pipeline connected to the main waste gas conveying pipeline and the No. 1 coke oven gas pipeline, a second quick-cut-off valve, a second electric regulating valve, a first flow meter, a second temperature measuring element, a second pressure transmitter, a first check valve, and a first pressurized open-hole gate valve are sequentially arranged; on the second waste gas conveying branch pipeline connected to the main waste gas conveying pipeline and the No. 2 coke oven gas pipeline, a third quick-cut-off valve, a third electric regulating valve, a second flow meter, a third temperature measuring element, a third pressure transmitter, a second check valve, and a second pressurized open-hole gate valve are sequentially arranged.
[0009] A further improvement of the present invention is that the reliable isolation device includes one electric slide gate valve and one electric butterfly valve.
[0010] A further improvement of the present invention is that a waste gas direct discharge pipe connected to a chimney is provided before the first electric regulating valve, and a fifth electric regulating valve is provided on the waste gas direct discharge pipe.
[0011] A further improvement of the present invention is that a waste gas bypass pipe connected to the coke oven flue gas desulfurization and denitrification system is provided after the first electric regulating valve, and a fourth electric regulating valve, a fourth pressure transmitter, a fourth temperature measuring element and a third flow meter are sequentially provided on the waste gas bypass pipe.
[0012] A further improvement of this utility model is that the second, third, and fourth electric regulating valves are interlocked with the coke oven reversing mechanism. When the reversing begins, the second and third electric regulating valves are closed, while the fourth electric regulating valve on the waste gas bypass pipeline is opened.
[0013] A further improvement of this utility model is that the mixer includes a straight section of the main gas pipeline, an inclined section of the waste gas branch pipe, and a static mixing element; the diameter of the straight section of the main gas pipeline is the same as that of the main coke oven gas pipeline; the inclined section of the waste gas branch pipe is connected to the main coke oven gas pipeline at an angle of 30-45°; and the static mixing element is located 1-2 times the pipe diameter downstream of the mixer.
[0014] A further improvement of this utility model is that: the first quick-shut-off valve, the second quick-shut-off valve, and the third quick-shut-off valve are all connected to the safety interlock control cabinet via control cables; the safety interlock control cabinet simultaneously receives detection signals from the combustible gas analyzer, the first pressure transmitter, the first temperature sensing element, the first flow meter, the second temperature sensing element, the second pressure transmitter, the second flow meter, the third temperature sensing element, and the third pressure transmitter.
[0015] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows: 1. This utility model introduces a method to reduce CO emissions by passing the flue gas from the dry quenching pre-storage section through a bag filter and then sending it into the coke oven heating gas pipeline. The CO in the flue gas enters the coke oven gas heating system and is burned to generate CO2. CO2 is then treated together with the coke oven flue gas through the coke oven flue gas desulfurization and denitrification system to meet the emission standards before being discharged from the coke oven chimney.
[0016] 2. This invention realizes the resource utilization of CO gas by using it as supplementary fuel in the coke oven heating system, which reduces the consumption of raw coal gas and improves energy efficiency. At the same time, the combustible components in the exhaust gas (dry quenching flue gas) help to lengthen the flame, improve the high-level heating effect of the coke oven, reduce the temperature difference between the top and bottom of the carbonization chamber, and improve the quality of coke.
[0017] 3. Compared with the traditional combustion or catalytic oxidation methods for treating dry quenching coke flammable gas, this system has low operating costs, requires no additional energy consumption or expensive catalysts, and can recover some heat energy, thus having significant economic advantages.
[0018] 4. This utility model ensures the safe and stable operation of the system by setting up oxygen, dust and pressure monitoring instruments and quick shut-off valves. When the oxygen content exceeds the standard or the pressure is lower than the gas system pressure, the system can quickly cut off the waste gas passage and transfer it to the original chimney for discharge, effectively preventing the occurrence of safety accidents.
[0019] 5. This utility model fully considers special operating conditions such as coke oven reversing. By closing the exhaust gas inlet regulating valve and adjusting the desulfurization and denitrification regulating valve, it ensures the stable operation of the system under various operating conditions. The remaining exhaust gas (dry quenching coke release flue gas) can be flexibly discharged according to the actual situation.
[0020] 6. This utility model has good compatibility with existing dry quenching systems and coke oven gas systems, requires little modification work, has a short implementation period, does not affect the original production process, and is easy to promote and apply in various coking enterprises. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of a CO emission reduction system in the flue gas released from the pre-storage chamber of a dry quenching furnace, provided in an embodiment of this utility model. The components include: 1. Main outlet of dry quenching coke venting gas; 2. Dust collector; 3. Dust collector fan; 4. No. 1 coke oven gas pipeline; 5. No. 2 coke oven gas pipeline; 6. Coke oven flue gas desulfurization and denitrification system; 7. Chimney; 8. First electric regulating valve; 9. First quick-cut-off valve; 10. Rupture disc; 11. Reliable isolation device; 11-1. Electric slide gate valve; 11-2. Electric butterfly valve; 12. Combustible gas analyzer; 13. First pressure transmitter; 14. First temperature sensing element; 15. Second quick-cut-off valve; 16. Second electric regulating valve. 17. First flow meter; 18. Second temperature sensing element; 19. Second pressure transmitter; 20. First check valve; 21. First pressurized open-hole gate valve; 22. Third quick-shut-off valve; 23. Third electric regulating valve; 24. Second flow meter; 25. Third temperature sensing element; 26. Third pressure transmitter; 27. Second check valve; 28. Second pressurized open-hole gate valve; 29. Fourth electric regulating valve; 30. Fourth pressure transmitter; 31. Fourth temperature sensing element; 32. Third flow meter; 33. Fifth electric regulating valve. Detailed Implementation
[0022] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.
[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1 As shown, a CO emission reduction system for the pre-storage flue gas of a dry quenching furnace includes a main outlet 1 for the dry quenching flue gas, a dust collector 2, a dust removal fan 3, a main exhaust gas pipeline, and a main coke oven gas pipeline connected in sequence. The dry quenching flue gas enters the main coke oven gas pipeline after the regulating valve of the basement gas pipeline, and a mixer is configured to fully mix the dry quenching flue gas with the gas. The main exhaust gas pipeline is equipped with a first electric regulating valve 8, a first quick-cut-off valve 9, a rupture disc 10, a reliable isolation device 11, a combustible gas analyzer 12 for monitoring the oxygen and dust concentrations in the dry quenching flue gas, a first pressure transmitter 13 for monitoring the pressure of the dry quenching flue gas, and a first temperature measuring element 14 for monitoring the temperature of the dry quenching flue gas.
[0026] Furthermore, the main coke oven gas pipeline includes No. 1 coke oven gas pipeline 4 and No. 2 coke oven gas pipeline 5; on the first branch pipeline connecting the main exhaust gas pipeline to No. 1 coke oven gas pipeline 4 (after the regulating valve), a second quick shut-off valve 15, a second electric regulating valve 16, a first flow meter 17, a second temperature measuring element 18, a second pressure transmitter 19, a first check valve 20, and a first pressurized open gate valve 21 are installed in sequence; on the second branch pipeline connecting the main exhaust gas pipeline to No. 2 coke oven gas pipeline 5 (after the regulating valve), a third quick shut-off valve 22, a third electric regulating valve 23, a second flow meter 24, a third temperature measuring element 25, a third pressure transmitter 26, a second check valve 27, and a second pressurized open gate valve 28 are installed in sequence.
[0027] Furthermore, the reliable isolation device 11 includes an electric slide gate valve 11-1 and an electric butterfly valve 11-2.
[0028] Furthermore, a waste gas direct discharge pipe connected to the chimney 7 is provided before the first electric regulating valve 8, and a fifth electric regulating valve 33 is provided on the waste gas direct discharge pipe.
[0029] Furthermore, a waste gas bypass pipe connected to the coke oven flue gas desulfurization and denitrification system 6 is provided after the first electric regulating valve 8. A fourth electric regulating valve 29, a fourth pressure transmitter 30, a fourth temperature measuring element 31 and a third flow meter 32 are sequentially installed on the waste gas bypass pipe.
[0030] Furthermore, the second electric regulating valve 16, the third electric regulating valve 23, and the fourth electric regulating valve 29 are interlocked with the coke oven reversing mechanism. When the reversing begins, the second electric regulating valve 16 and the third electric regulating valve 23 are closed, while the fourth electric regulating valve 29 on the waste gas bypass pipeline is opened.
[0031] Furthermore, the mixer includes a straight section of the main gas pipeline, an inclined section of the waste gas branch pipe, and a static mixing element; the diameter of the straight section of the main gas pipeline is the same as that of the main coke oven gas pipeline; the inclined section of the waste gas branch pipe is connected to the main coke oven gas pipeline at an angle of 30-45°; the static mixing element is located 1-2 times the pipe diameter downstream of the mixer.
[0032] Furthermore, the first quick-shut-off valve 9, the second quick-shut-off valve 15, and the third quick-shut-off valve 22 are all connected to the safety interlock control cabinet via control cables; the safety interlock control cabinet simultaneously receives detection signals from the combustible gas analyzer 12, the first pressure transmitter 13, the first temperature sensing element 14, the first flow meter 17, the second temperature sensing element 18, the second pressure transmitter 19, the second flow meter 24, the third temperature sensing element 25, and the third pressure transmitter 26.
[0033] Furthermore, dust collector 2 is a fully enclosed bag filter dust collector; a spark arrester is installed between dust collector 2 and dust collector fan 3; the spark arrester includes a porous baffle assembly, a water mist spray device, and a temperature sensor. Dust collector fan 3 is driven by a variable frequency speed control motor, and its speed signal is interlocked with the pressure signal of the coke oven gas main pipeline, and the air volume is automatically adjusted through a PID controller.
[0034] This utility model provides a CO emission reduction system for the pre-storage flue gas in a dry quenching furnace. In implementation, the dry quenching flue gas from the pre-storage section is filtered by a bag filter 2 and then fed into the coke oven's heating gas pipeline (coke oven gas main pipeline) via a dry quenching flue gas dust removal fan 3. To ensure stable pressure of the medium entering the pipeline, the dry quenching flue gas is connected to the coke oven gas main pipeline after the regulating valve on the main gas pipe in the basement, and a dedicated mixer is installed to ensure thorough mixing of the dry quenching flue gas and the gas. The mixer design should consider factors such as gas velocity and pressure loss to ensure uniform mixing without affecting the main pipeline pressure.
[0035] This system has a dual function: firstly, the dry quenching flue gas fed into the gas system can lengthen the flame and reduce the temperature difference between the upper and lower parts of the carbonization chamber, significantly improving the high-temperature heating effect of the coke oven; secondly, it converts CO into CO2 through combustion, achieving emission reduction targets. During implementation, if the amount of dry quenching flue gas exceeds the capacity of the coke oven's heating gas system, the remaining portion can be discharged from the existing chimney 7 or directly fed into the coke oven flue gas desulfurization and denitrification system 6 for treatment.
[0036] In response to the special operating condition of coke oven reversing, the system is equipped with special measures: the second electric regulating valve 16 and the third electric regulating valve 23 are automatically closed during reversing to prevent the gas from backflowing into the waste gas conveying pipeline due to high gas pressure. The fourth electric regulating valve 29 installed on the waste gas bypass pipeline is used to balance the pressure fluctuations during reversing and ensure the stable operation of the system.
[0037] Safety measures are crucial for implementing this invention. Since the dry quenching flue gas is fed into the gasification system, absolute safety must be ensured. Therefore, a complete monitoring system is installed on the main exhaust gas pipeline, including: a combustible gas analyzer 12 for real-time monitoring of oxygen and dust concentrations in the dry quenching flue gas; a first pressure transmitter 13 for monitoring the pressure of the dry quenching flue gas; and a first temperature measuring element 14 for monitoring the temperature of the dry quenching flue gas. These monitors are interlocked with a quick-shutdown valve. When the oxygen content exceeds the safety limit (typically set at 1%) or the pressure falls below the gasification system pressure, the system immediately shuts off the exhaust gas passage, automatically switching to the original chimney 7 emission mode or directly feeding the gas into the coke oven flue gas desulfurization and denitrification system 6 for treatment, ensuring the safety of the coke oven heating gas system.
[0038] The system operating parameters should be optimized and adjusted according to the actual working conditions. A first flow meter 17, a second temperature measuring element 18, and a second pressure transmitter 19 are installed on the first waste gas conveying branch pipe connecting the main waste gas conveying pipeline to the No. 1 coke oven gas pipeline 4. A second flow meter 24, a third temperature measuring element 25, and a third pressure transmitter 26 are installed on the second branch pipe connecting the main waste gas conveying pipeline to the No. 2 coke oven gas pipeline 5. A fourth pressure transmitter 30, a fourth temperature measuring element 31, and a third flow meter 32 are installed on the waste gas bypass pipe connected to the coke oven flue gas desulfurization and denitrification system 6 after the first electric regulating valve 8. The operating parameters mainly include: the amount of dry quenching vented flue gas introduced, temperature, and pressure. For example, the pressure of the gas in the No. 1 coke oven gas pipeline 4 is P = 0.51-10.5 kPa, and the flow rate is Q = 50000 Nm³. 3 / h, temperature T=34.8-51.3℃; while the dry quenching flue gas in the first waste gas conveying branch pipeline has a pressure of P=10kPa and a flow rate of Q=1500-4500Nm³. 3 / h, temperature T=45℃. The pressure of the gas in pipeline 5 of coke oven #2 is P=0.89-5.36kPa, and the flow rate is Q=215000Nm³. 3 / h, temperature T=16.9-28℃; while the dry quenching flue gas in the second waste gas conveying branch pipeline has a pressure of 10kPa and a flow rate of Q=25500-28500Nm³. 3 / h, temperature T=45℃. The amount of dry quenching vent gas introduced is generally controlled within the range of 5-15% of the total gas volume, specifically determined based on the coke oven's operating status and the amount of dry quenching vent gas generated. The mixer should be inspected and maintained regularly to ensure mixing effectiveness. All monitoring instruments should be calibrated regularly to ensure accurate and reliable data.
[0039] The CO emission reduction system for the pre-storage chamber flue gas of a dry quenching furnace provided by this utility model has been implemented and is operating well. Actual operation data shows that the CO emission reduction rate reaches over 96%, the uniformity of high-altitude heating in the coke oven is improved by 15%, and the annual savings in pollution discharge tax and treatment costs are approximately 3.5 million yuan, achieving significant environmental and economic benefits.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A system for reducing the emission of CO gas in the flue gas released from the pre-storage chamber of a dry quenching furnace, characterized in that it comprises: The system includes a main outlet (1) for dry quenching flue gas, a dust collector (2), a dust removal fan (3), a main exhaust gas pipeline, and a main coke oven gas pipeline connected in sequence. The dry quenching flue gas enters the main coke oven gas pipeline after the regulating valve of the basement gas pipeline, and a mixer is configured to fully mix the dry quenching flue gas with the gas. The main exhaust gas pipeline is equipped with a first electric regulating valve (8), a first quick shut-off valve (9), a rupture disc (10), a reliable isolation device (11), a combustible gas analyzer (12) for real-time monitoring of oxygen and dust concentration in the dry quenching flue gas, a first pressure transmitter (13) for real-time monitoring of the pressure of the dry quenching flue gas, and a first temperature measuring element (14) for real-time monitoring of the temperature of the dry quenching flue gas.
2. A system for reducing the emission of CO gas from the pre-storage chamber of a dry quenching furnace according to claim 1, characterized in that: The main coke oven gas pipeline includes a No. 1 coke oven gas pipeline (4) and a No. 2 coke oven gas pipeline (5) arranged in parallel. On the first waste gas transmission branch pipeline connected to the main waste gas transmission pipeline and the No. 1 coke oven gas pipeline (4), a second quick shut-off valve (15), a second electric regulating valve (16), a first flow meter (17), a second temperature measuring element (18), a second pressure transmitter (19), a first check valve (20), and a first pressurized open gate valve (21) are arranged in sequence. On the second waste gas transmission branch pipeline connected to the main waste gas transmission pipeline and the No. 2 coke oven gas pipeline (5), a third quick shut-off valve (22), a third electric regulating valve (23), a second flow meter (24), a third temperature measuring element (25), a third pressure transmitter (26), a second check valve (27), and a second pressurized open gate valve (28) are arranged in sequence.
3. A system for reducing the emission of CO gas from the pre-storage chamber of a dry quenching furnace according to claim 1, characterized in that: The reliable isolation device (11) includes an electric slide gate valve (11-1) and an electric butterfly valve (11-2).
4. A system for reducing the emission of CO gas from the pre-storage chamber of a dry quenching furnace according to claim 1, characterized in that: A waste gas direct discharge pipe connected to the chimney (7) is provided in front of the first electric regulating valve (8), and a fifth electric regulating valve (33) is provided on the waste gas direct discharge pipe.
5. A system for reducing emission of CO gas from pre-chamber released flue gas of a dry quenching furnace according to claim 1, characterized in that: A waste gas bypass pipe connected to the coke oven flue gas desulfurization and denitrification system (6) is provided after the first electric regulating valve (8). A fourth electric regulating valve (29), a fourth pressure transmitter (30), a fourth temperature measuring element (31) and a third flow meter (32) are sequentially provided on the waste gas bypass pipe.
6. A system for reducing the emission of CO gas in the pre-storage chamber of a dry quenching furnace according to claim 2 or 5, characterized in that: The second electric regulating valve (16), the third electric regulating valve (23) and the fourth electric regulating valve (29) are interlocked with the coke oven reversing mechanism. When the reversing starts, the second electric regulating valve (16) and the third electric regulating valve (23) are closed, and the fourth electric regulating valve (29) on the waste gas bypass pipeline is opened at the same time.
7. A system for reducing the emission of CO gas from the pre-storage chamber of a dry quenching furnace according to claim 1, characterized in that: The mixer includes a straight section of the main gas pipeline, an inclined section of the waste gas branch pipe, and a static mixing element; the diameter of the straight section of the main gas pipeline is the same as that of the main coke oven gas pipeline; the inclined section of the waste gas branch pipe is connected to the main coke oven gas pipeline at an angle of 30-45°; the static mixing element is located 1-2 times the pipe diameter downstream of the mixer.
8. A system for reducing the emission of CO gas from the pre-storage chamber of a dry quenching furnace according to claim 1, characterized in that: The first quick shut-off valve (9), the second quick shut-off valve (15), and the third quick shut-off valve (22) are all connected to the safety interlock control cabinet via control cables; the safety interlock control cabinet simultaneously receives detection signals from the combustible gas analyzer (12), the first pressure transmitter (13), the first temperature measuring element (14), the first flow meter (17), the second temperature measuring element (18), the second pressure transmitter (19), the second flow meter (24), the third temperature measuring element (25), and the third pressure transmitter (26).